Grellert, Edward A., Michael D. Newcomb, and P.M. Bentler. "Childhood Play Activities of Male and Female Homosexuals and Heterosexuals." Archives of Sexual Behavior 2, no. 6 (1982): 452-477. 1982
Completed questionnaires, men (C), groups 2-26 undated
Completed questionnaires, women (C), groups 2-44 undated
Completed questionnaires, men, group A-V 1977, undated
Completed questionnaires, women (H), groups D-Y, AA-HH undated